US5530723A - Automatic frequency control arrangement - Google Patents
Automatic frequency control arrangement Download PDFInfo
- Publication number
- US5530723A US5530723A US08/285,407 US28540794A US5530723A US 5530723 A US5530723 A US 5530723A US 28540794 A US28540794 A US 28540794A US 5530723 A US5530723 A US 5530723A
- Authority
- US
- United States
- Prior art keywords
- frequency
- signal
- sample
- data
- state
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/14—Demodulator circuits; Receiver circuits
- H04L27/144—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements
- H04L27/152—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements using controlled oscillators, e.g. PLL arrangements
- H04L27/1525—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements using controlled oscillators, e.g. PLL arrangements using quadrature demodulation
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Superheterodyne Receivers (AREA)
Abstract
Description
Claims (18)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9316363A GB2280801B (en) | 1993-08-06 | 1993-08-06 | Automatic frequency control arrangement |
GB9316363 | 1993-08-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
US5530723A true US5530723A (en) | 1996-06-25 |
Family
ID=10740097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/285,407 Expired - Lifetime US5530723A (en) | 1993-08-06 | 1994-08-03 | Automatic frequency control arrangement |
Country Status (5)
Country | Link |
---|---|
US (1) | US5530723A (en) |
EP (1) | EP0637882B1 (en) |
JP (1) | JP3493458B2 (en) |
DE (1) | DE69429476T2 (en) |
GB (1) | GB2280801B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997004530A1 (en) * | 1995-07-17 | 1997-02-06 | Motorola Inc. | Radio receiver and method of calibrating same |
US5717721A (en) * | 1995-08-21 | 1998-02-10 | General Research Of Electronics, Inc. | Demodulation correcting circuit for FSK receiver |
US6388248B1 (en) * | 2000-07-06 | 2002-05-14 | Eaton Corporation | Control voltage isolation system for electrical rotating apparatus utilizing fiber optics and associated method |
US20040203767A1 (en) * | 2002-08-06 | 2004-10-14 | General Motors Corporation | Method and system for registering an in-vehicle cellular phone |
EP1631030A1 (en) * | 2004-08-27 | 2006-03-01 | Integration Associates Inc. | Apparatus and method for automatic frequency correction for an FSK receiver system |
US20060146914A1 (en) * | 2004-08-27 | 2006-07-06 | Integration Associates Inc. | Method and apparatus for frequency hopping medium access control in a wireless network |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10163756A (en) * | 1996-11-28 | 1998-06-19 | Fujitsu Ltd | Automatic frequency controller |
JP3070733B2 (en) | 1997-12-12 | 2000-07-31 | 日本電気株式会社 | Automatic frequency control method and device |
KR100374944B1 (en) * | 2001-02-02 | 2003-03-06 | 주식회사 젤라인 | Synchronizer of frequency shift keying type receiver for power line communication |
US7672356B2 (en) | 2005-05-19 | 2010-03-02 | Itt Manufacturing Enterprises, Inc. | Method and apparatus for detection of a frequency coded sequence in the presence of sinusoidal interference |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2137836A (en) * | 1983-04-06 | 1984-10-10 | Multitone Electronics Plc | FM Demodulators |
US4523324A (en) * | 1981-10-26 | 1985-06-11 | U.S. Philips Corporation | Direct modulation FM data receiver |
US4647864A (en) * | 1986-04-21 | 1987-03-03 | General Electric Company | Variable-delay, sine-cosine non-coherent demodulator |
GB2213663A (en) * | 1987-12-11 | 1989-08-16 | Philips Electronic Associated | Data demodulator carrier phase locking |
GB2245442A (en) * | 1990-06-20 | 1992-01-02 | Mitsubishi Electric Corp | Frequency error detecting apparatus |
US5208835A (en) * | 1990-09-24 | 1993-05-04 | In-Situ, Inc. | Automatic frequency control system and method for frequency-shift-key data transmission systems |
US5434889A (en) * | 1990-04-26 | 1995-07-18 | U.S. Philips Corporation | Receiver comprising an arrangement for estimating a frequency deviation |
-
1993
- 1993-08-06 GB GB9316363A patent/GB2280801B/en not_active Expired - Fee Related
-
1994
- 1994-07-05 DE DE69429476T patent/DE69429476T2/en not_active Expired - Fee Related
- 1994-07-05 EP EP94304951A patent/EP0637882B1/en not_active Expired - Lifetime
- 1994-07-29 JP JP19623794A patent/JP3493458B2/en not_active Expired - Fee Related
- 1994-08-03 US US08/285,407 patent/US5530723A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4523324A (en) * | 1981-10-26 | 1985-06-11 | U.S. Philips Corporation | Direct modulation FM data receiver |
GB2137836A (en) * | 1983-04-06 | 1984-10-10 | Multitone Electronics Plc | FM Demodulators |
US4647864A (en) * | 1986-04-21 | 1987-03-03 | General Electric Company | Variable-delay, sine-cosine non-coherent demodulator |
GB2213663A (en) * | 1987-12-11 | 1989-08-16 | Philips Electronic Associated | Data demodulator carrier phase locking |
US5434889A (en) * | 1990-04-26 | 1995-07-18 | U.S. Philips Corporation | Receiver comprising an arrangement for estimating a frequency deviation |
GB2245442A (en) * | 1990-06-20 | 1992-01-02 | Mitsubishi Electric Corp | Frequency error detecting apparatus |
US5150382A (en) * | 1990-06-20 | 1992-09-22 | Mitsubishi Denki Kabushiki Kaisha | Frequency error detecting apparatus |
US5208835A (en) * | 1990-09-24 | 1993-05-04 | In-Situ, Inc. | Automatic frequency control system and method for frequency-shift-key data transmission systems |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997004530A1 (en) * | 1995-07-17 | 1997-02-06 | Motorola Inc. | Radio receiver and method of calibrating same |
US5701600A (en) * | 1995-07-17 | 1997-12-23 | Motorola, Inc. | Radio receiver and method of calibrating same |
US5717721A (en) * | 1995-08-21 | 1998-02-10 | General Research Of Electronics, Inc. | Demodulation correcting circuit for FSK receiver |
US6388248B1 (en) * | 2000-07-06 | 2002-05-14 | Eaton Corporation | Control voltage isolation system for electrical rotating apparatus utilizing fiber optics and associated method |
US20040203767A1 (en) * | 2002-08-06 | 2004-10-14 | General Motors Corporation | Method and system for registering an in-vehicle cellular phone |
US7369849B2 (en) * | 2002-08-06 | 2008-05-06 | General Motors Corporation | Method and system for registering an in-vehicle cellular phone |
EP1631030A1 (en) * | 2004-08-27 | 2006-03-01 | Integration Associates Inc. | Apparatus and method for automatic frequency correction for an FSK receiver system |
US20060045216A1 (en) * | 2004-08-27 | 2006-03-02 | Integration Associates Inc. | Apparatus and method for automatic frequency correction for a receiver system |
US20060146914A1 (en) * | 2004-08-27 | 2006-07-06 | Integration Associates Inc. | Method and apparatus for frequency hopping medium access control in a wireless network |
US7680224B2 (en) | 2004-08-27 | 2010-03-16 | Silicon Laboratories Inc. | Apparatus and method for automatic frequency correction for a receiver system |
US7822397B2 (en) | 2004-08-27 | 2010-10-26 | Silicon Laboratories Inc. | Method and apparatus for frequency hopping medium access control in a wireless network |
Also Published As
Publication number | Publication date |
---|---|
GB2280801A (en) | 1995-02-08 |
DE69429476T2 (en) | 2002-05-16 |
GB2280801B (en) | 1997-12-10 |
JPH07170302A (en) | 1995-07-04 |
JP3493458B2 (en) | 2004-02-03 |
GB9316363D0 (en) | 1993-09-29 |
EP0637882B1 (en) | 2001-12-19 |
DE69429476D1 (en) | 2002-01-31 |
EP0637882A1 (en) | 1995-02-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: PLESSEY SEMICONDUCTORS LIMITED, UNITED KINGDOM Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MAPLESTON, DAVID BERNARD;REEL/FRAME:007125/0317 Effective date: 19940826 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
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STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
AS | Assignment |
Owner name: CANADIAN IMPERIAL BANK OF COMMERCE, AS SECURED PAR Free format text: SECURITY INTEREST;ASSIGNOR:MITEL CORPORATION, A CORPORATION UNDER THE LAWS OF CANADA;REEL/FRAME:009445/0299 Effective date: 19980212 |
|
AS | Assignment |
Owner name: MITEL SEMICONDUCTOR LIMITED, UNITED KINGDOM Free format text: CHANGE OF NAME;ASSIGNOR:PLESSEY SEMICONDUCTOR LIMITED;REEL/FRAME:009570/0972 Effective date: 19980219 |
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AS | Assignment |
Owner name: CANADIAN IMPERIAL BANK OF COMMERCE, AS SECURED PAR Free format text: RE-RECORD TO CORRECT THE ASSIGNOR PREVIOUSLY RECORDED ON REEL 9445 FRAME 0299.;ASSIGNOR:MITEL SEMICONDUCTOR LIMITED;REEL/FRAME:009798/0040 Effective date: 19980212 |
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FPAY | Fee payment |
Year of fee payment: 4 |
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AS | Assignment |
Owner name: MITEL CORPORATION, CANADA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CANADIAN IMPERIAL BANK OF COMMERCE;REEL/FRAME:011590/0406 Effective date: 20010216 Owner name: MITEL, INC., A DELAWARE CORPORATION, CANADA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CANADIAN IMPERIAL BANK OF COMMERCE;REEL/FRAME:011590/0406 Effective date: 20010216 Owner name: MITEL SEMICONDUCTOR, INC., A DELAWARE CORPORATION, Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CANADIAN IMPERIAL BANK OF COMMERCE;REEL/FRAME:011590/0406 Effective date: 20010216 Owner name: MITEL SEMICONDUCTOR, LIMITED, CANADA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CANADIAN IMPERIAL BANK OF COMMERCE;REEL/FRAME:011590/0406 Effective date: 20010216 Owner name: MITEL TELCOM LIMITED CORPORATION, CANADA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CANADIAN IMPERIAL BANK OF COMMERCE;REEL/FRAME:011590/0406 Effective date: 20010216 Owner name: MITEL SEMICONDUCTOR AMERICAS, INC., A DELAWARE COR Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CANADIAN IMPERIAL BANK OF COMMERCE;REEL/FRAME:011590/0406 Effective date: 20010216 |
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FPAY | Fee payment |
Year of fee payment: 8 |
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AS | Assignment |
Owner name: INTEL CORPORATION, CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ZARLINK SEMICONDUCTOR LIMITED;REEL/FRAME:018087/0174 Effective date: 20060714 |
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FPAY | Fee payment |
Year of fee payment: 12 |
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REMI | Maintenance fee reminder mailed |